Final Answer:
Jo couldn't marry Alex in the first place because she was legally underage.
thus correct option is C) She was legally underage
Step-by-step explanation:
Jo couldn't marry Alex in the first place because she was legally underage. The legal age for marriage varies across different jurisdictions, and individuals must meet the minimum age requirement to marry without parental or guardian consent. In Jo's case, being underage meant that she did not have the legal capacity to enter into a marriage contract.
Legislation regarding the minimum age for marriage aims to protect individuals, particularly minors, from entering into commitments they may not fully comprehend or consent to. Laws governing the age of marriage seek to ensure that individuals have the maturity and legal capacity to make such a significant life decision.
thus correct option is C) She was legally underage